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Given some (but not all) monthly totals of people with measles (or counts of product-units sold, or counts of retweets), how can we recover the weekly counts? Requiring smoothness between successive weeks is reasonable - but can we do better, if we have some domain knowledge? For example, we know that measles (flu, count-of-retweets, etc) follow a specific cascade model, like the so-called 'SIS'....
In this paper, we consider the design problem of a decentralized variable gain robust controller that provides practical tracking for a class of large-scale interconnected systems with mismatched uncertainties. Furthermore, we show that sufficient conditions for the existence of the proposed decentralized variable gain robust controller are reduced to the feasibility of linear matrix inequalities...
Embedded grids have been increasingly adopted into applications such as More Electric Aircraft where different power converters are interconnected to each other. Interactions between the grid components poses the risk of instability to the system, more so when in the presence of reduced passive filters. An approach of automated and scalable tuning of such embedded grids with consideration for the...
In this paper an approach is developed for the online diagnosis of timed discrete events systems, the formalism used is the labeled timed Petri nets. We have introduced a new concept is: enriched set of possible states. In addition to online diagnosis our approach allows us to avoid the combinatorial explosion of states.
In the process of epidemic spreading, the most important question is: how a healthy individual does catch a disease? To answer this question, researchers have developed plenty models depending on the assumption that said the contamination factor is a β coefficient, which is defined probabilistically, representing the infection rate. However, in the real life, the contagion process could depend on...
The process where a laser and a Si waveguide were coupled was simulated by MATLAB. In order to obtain the coupling efficiency accurately and quickly, an improved finite-difference beam-propagation method(FD-BPM) and the simple transparent boundary condition(STBC) were selected. Several spot-size convertors (SSCs) of different structure with tapered Si waveguide, square SiON waveguide and SiO2 layer...
This study concerns the problem of control for stochastic Markov jump systems with generally uncertain transition rates such that the system is finite-time dissipativity. First, sufficient conditions for finite-time boundedness is obtained by constructing Lyapunov function. Then, a state feedback controller is designed based on the results obtained. Finally, a numerical example is given to verify...
In this paper, we study the influence from the sentiment of regular tweets on retweeting. We propose a method to calculate the sentiment score for each tweet and each Twitter user. This method enables us to place the tweets and retweets into the same time period to explore the sentiment factor. We adopt the correlation coefficient between the sentiment scores of regular tweets and those of retweets...
Based on the parabolic potential approach (PPA) and equivalent number of gates (ENG), a new quasi-3-D subthreshold current/swing model for the fully depleted quadruple-Gate (FDQG) MOSFET is developed. The model explicitly shows how the channel length, gate oxide thickness, and silicon film thickness affect the subthreshold current/swing behavior. The model is verified by its calculated results matching...
This paper presents the dimensional design methodology for a hexarot-based simulator with high-G centrifugal motions. The dimensional synthesis of the mechanism is performed, and the optimal kinematic parameters of the manipulator for the translational and rotational motions are obtained. The maximum forces and moments exerted to each joint of the mechanism are calculated based on the dynamics of...
A multilevel evaluation model integrating Triangular Fuzzy Numbers (TFNs), Analytical Hierarchical Process (AHP) and Grey Relational Analysis (GRA) was Proposed to evaluate Brownfield Redevelopment Projects (BRPs). Three schemes were proposed including 1: Housing Society, 2: Industrial Park 3: Commercial Development. Initially, primary indicators were identified through extensive literature review...
Epidemic is a hot issue in the public safety field. In this paper, we construct a two-layered networks to analyze that how the information diffusion prevents an epidemic spreading in the population. We used the effective degree theory to analyze the the spreading process which shows the results in high accuracy. Compared with the result of the mean field theory, we find our results obtained from the...
The existing localization methods for the satellite communication interference source based on satellites are too complex and costly to be used in practical applications. A new localization method based on two satellites for the interference source is proposed in this paper. By combining two localization parameters named time difference of arrival (TDOA) between two satellites and the direction of...
Trace buffers play a crucial role in curbing the obstacle of limited observability of internal states for error localization during post-silicon stage. Given the constraint of area over-head, selecting appropriate signals which are to be stored in the trace buffers is of paramount importance for the overall success of this observability enhancement mechanism. This paper proposes a register-transfer...
Magnetic levitator is a challenging problem to address complex control systems in control teaching. In this paper the magnetic levitator model is synthetized using a Port Hamiltonian approach and with this model, an observed state gain feedback is tuned with a LQG technique. Then a SMC that used the observed state gain feedback in the sliding zone is developed, establishing the requirements for feedback...
This work focuses on the study of an agricultural articulated vehicle which carries an implement (such as a plow or a harvester). The derivation of a mathematical model of its kinematics is presented, and then the methodology of model predictive control is used in order to have the implement follow a predefined trajectory. The performance of the system and the corresponding controller is ilustrated...
In this paper an ultrasonic reflectometry approach to measure the thermal conductivity and temperature of a material by contact is presented. This device can be utilized for monitoring material properties during manufacturing, and robotic handling of objects. The sensor comprises an AlN piezoelectric ultrasonic transducer operating at GHz frequencies, situated on one side of a silicon chip. The transducer...
One of the most important “tasks” of the technical management's decision making is showing the importance of factors of given part of maintenance engineering. This importance plays a decisive role in the decision of maintenance management. This paper shows the results of our micro experiments conducted as part of a long-term research of Authors.
In this paper, the problem of flocking of MultiAgent Systems (MAS) in presence of system uncertainties and unknown disturbances is investigated. A biologically-inspired novel distributed resilient controller based on a computational model of emotional learning in mammalian brain is proposed. The methodology, known as Brain Emotional Learning Based Intelligent Controller (BELBIC), embeds a resilience...
Solid state lasers are complex systems that sometimes display unstable aperiodic output. This behavior may be due to a deterministic low dimensional chaos. In this paper we show the results of a MATLAB based algorithm that implements nonlinear dynamics theory directly from a raw osciloscope trace and determines if the system is chaotic or not and characterizes its underlying attractor.
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